| (subclass ElectricalCircuit ElectricDevice) | engineering.kif 984-984 | ElectricalCircuit は ElectricDevice の subclass では %n |
| (subclass Amplifier ElectricalCircuit) | engineering.kif 990-990 | Amplifier は ElectricalCircuit の subclass では %n |
| (subclass FrequencyFilter ElectricalCircuit) | engineering.kif 995-995 | FrequencyFilter は ElectricalCircuit の subclass では %n |
| (subclass Rectifier ElectricalCircuit) | engineering.kif 1010-1010 | Rectifier は ElectricalCircuit の subclass では %n |
| (subclass OperationalAmplifier ElectricalCircuit) | engineering.kif 1044-1044 | OperationalAmplifier は ElectricalCircuit の subclass では %n |
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